1. Diseases of the Skin;Macleod,1921
2. Stelwagon, H. W.: Diseases of the Skin, 3rd ed., p. 467.
3. Malarial Urticaria and Allergy;Eyermann;J. Allergy,1930
4. Food Allergy in Henoch's Purpura;Alexander;Arch. Dermat. & Syph,1927
5. Allergic Purpura;Alexander;J. A. M. A,1929